Gridmove will not recognize Songbird as a window (I assume it sees it as an object or something) and therefore does not allow me to dock it into my grid configuration. The grid does not appear. Other programs running at the same time as Songbird, however, such as Pidgin, will dock normally.

It is notable that Songbird runs and has totally different window setups via skins- so fixing this may be quite tricky (I am using a skin where the buttons and layout are VERY different from the default installed skin). The program window name can change dynamically, too. (Mine scrolls every 400ms to show another character in the song name, artist, and current time into the song).